/in/foo.cc: In function 'int main()':
/in/foo.cc:109:7: warning: variable 'test' set but not used [-Wunused-but-set-variable]
   int test;
       ^~~~
/in/foo.cc: In function 'int cmp(int, node)':
/in/foo.cc:31:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^